right|thumb|Rachael, a replicant played by Sean Young in the 1982 film A replicant is a fictional bioengineered humanoid featured in the 1982 film Blade Runner and the 2017 sequel Blade Runner 2049.
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86af386d410f2abd8029123abc9369fee93d856d34301dbda9072f938be413f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1c727ee-d1bd-4ecf-af95-3e6ea3c8e743.json and https://artists.proofprofile.net/proofs/artist/f1c727ee-d1bd-4ecf-af95-3e6ea3c8e743.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sun Comes Up / It's Closer Then You Think
Saigon (Taxman Remix) / Smooth Operator (Sub Killaz Remix)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7bee4ab6d50876464d4befcdbd16f9576b90511b9f97d2ab44543fb40e83cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2158382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a0ce0cb248d63ed4d2138ee9cd8162e782ca7b6582ea376a7fd4164e9a9eed. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2158383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a2e5087cee538b461f78332fca5ba004e30f5da4dd050c96a012c0679c9a31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2203227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02d44fa419435ede14c1c7d78df0241b3fc9d4ab38c02409798c3db0abf3eda. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2054328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0a2d44840b4c4abeb45f9e2cc59317f333e1be7c47f2cd660ea6f69f9417fb. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2448783.